I hosed my ZUbuntu install a couple days ago in a misguided Maemo/Mer experiment, so it will be awhile before I can try this myself. I looked at the tar file and extracted the installer. Its pretty simple, the tar has couple .so files an a installer.sh that just copies them to the correct directories. It may work. Anyone want to give it a try?

(edited title to make it clear that we are talking about using NetWalker's flash package on the Zaurus, sorry)

The install script reports that it failed, but flash works anyway. You could just ignore the installer and copy the files to the correct location manually.

Video is extremely slow, but audio played with few interruptions. One thing to note, is that flash drains power faster then you would believe. My battery is on its last leg, but two minutes of video and my batter went from full charge to half charge. I don't have my power cord today so I can't test any more.